Modeling and Multivariate Methods - SAS

Chapter 10 Creating Neural Networks 287
Model Options
Table 10.7 Descriptions of the Training and Validation Measures of Fit (Continued)
Mean Abs Dev
Misclassification Rate
-LogLikelihood
SSE
Sum Freq
The average of the absolute values of the differences between the response
and the predicted response. When the response is nominal or ordinal, the
differences are between 1 and p (the fitted probability for the response level
that actually occurred).
The rate for which the response category with the highest fitted probability
is not the observed category. Appears only when the response is nominal or
ordinal.
Gives the negative of the log likelihood.
Gives the error sums of squares. Available only when the response is
continuous.
Gives the number of observations that are used. If you specified a Freq
variable in the Neural launch window, Sum Freq gives the sum of the
frequency column.
If there are multiple responses, fit statistics are given for each response, and an overall Generalized Rsquare
and -LogLikelihood is given.
Confusion Statistics
For nominal or ordinal responses, a Confusion Matrix report and Confusion Rates report is given. See
Figure 10.5. The Confusion Matrix report shows a two-way classification of the actual response levels and
the predicted response levels. For a categorical response, the predicted level is the one with the highest
predicted probability. The Confusion Rates report is equal to the Confusion Matrix report, with the
numbers divided by the row totals.
Model Options
Each model report has a red triangle menu containing options for producing additional output or saving
results. Table 10.8 describes the options in the red triangle menus.
Table 10.8 Model Report Options
Diagram
Show Estimates
Profiler
Shows a diagram representing the hidden layer structure.
Shows the parameter estimates in a report.
Launches the Prediction Profiler. For nominal or ordinal responses, each
response level is represented by a separate row in the Prediction Profiler. For
details about the options in the red triangle menu, see the “Visualizing,
Optimizing, and Simulating Response Surfaces” chapter on page 553.